Type-writing machine.



C. A. MARSCHEL.

TYPE WRITING MACHINE. APPLICATION FILED AUG.27. I917- Wye/War.- Y M m M Patented Apr. 23, 1918.

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CHRISTIAN ALBERT MARSCHEL, OF ST. LOUIS, MISSOURI, ASSIGNOR TO UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK, N. "51., A CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Apr. 23, 191%..

Application filed August 27, 1917. Serial No. 188,265.

To all whom, it may concern:

Be it known that I, CHRISTIAN ALBERT MARSCHEL, a citizen of the United States, residing in St. Louis and State of Missouri, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specification.

This invention relates to an improvement in typewriting machines, andmore especially to a fan-fold attachment for producing a number of copies of a series of formletters in a continuous manner. This application is an improvement on patent to J. A. B. Smith, No. 1,191,352.

In the present invention, a frame is provided on the typewriter carriage, which travels with the carriage and supports a carbon carriage, on which several sheets of carbon may be mounted, to be interleaved between the folds of a work-sheet web, so that thesame sheets of carbon can be used repeatedly with a number of successive sections of the web to produce manifold copies of a series of letters. The carbon sheets are supported on arms which project alternately from opposite sides of the carbon carriage, toward each other, so as to extend between the folds of the work-sheet web. The carbon arms are supported on two series of steps, one provided on each side of the carbon carriage, so as to hold the carbon sheets at different levels.

According to my invention, where a greater number of carbon sheets than the usual capacity of the machine is desired, supplementary carbon arms are supported by brackets detachably mounted on the sides of the carbon carriage, and providing supporting surfaces for the carbon arms at a higher level than the highest steps of the sides of the carbon carriage. The supplementary carbon arms are set into the brackets and extend toward each other at diiferent levels, so as to clear each other. The carbon arms are secured to the brackets by having a pair of pins which drop into corresponding openings provided in the suporting angle of the associated brackets.

he brackets are secured to the sides of the carbon carriage by set-screws, and are also located in their positions by centering pins.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure l is a perspective view, showing the typewriter carriage with the fan-fold attachment thereon and having the supple- .mentary carbon arms secured in position on the carbon carriage.

Fig. 2 is an-end view, in side elevation, showing the carbon carriage and the manner ofsecuring the supplementary carbon arms to the carriage.

The improvement is shown as attached to the well-known Underwood typewriting machine, in which a platen 1 is mounted to rotate on a carriage 2. The usual line-space mechanism 3, operated by a line-space lever 4, is provided for advancing the assembled pack of worksheet web and carbon sheets, indicated in general at 5, when positioned on the platen 1. For the purpose of supporting the assembled pack of work-sheet web and carbon sheets to travel with the carriage 2, there is provided a frame 6 which extends from the rear of the carriage 2. The frame 6 may be supported at its rear end so as to relieve the carriage 2 of a part of its weight by means of one or more rollers 7, which travel on a rail 8, supported on the usual typewriter frame by brackets 9.

The frame 6 forms ways on which a carbon carriage 10 may travel back and forth, from and toward the platen 1, for the purpose of properly placing the carbon sheets, one of which is indicated at 11, between successive sections of the work-sheet web. The carbon carriage 10 is provided with sides 12 and 13. each having a series of steps 14, those on the side 12 being located at a slightlv lower level than those on the side 13. The steps 14 are each provided with a pair of openings 15 to receive pins 16, provided on carbon arms 17. The carbon arms 17 extend toward each other in pairs. so as to project into the alternate folds of the work-sheet web. These carbon arms 17 also extend through loops 18, provided in the carbon sheets 11, so as to hold the carbon sheets taut when traveling with the worksheet web around the platen 1, and also so as to withdraw the carbon sheets relative to the work-sheet web in spacing the carbon sheets relative to the work-sheet web for a new letter.

As shown in the present embodiment of the invention, the carbon carriage 10 is provided with four fixed steps on each side, allowing for eight carbon arms and eight carbon sheets. Where a work-sheet Web having more layers than nine is used, the fixed steps may be supplemented by a pair of detachable steps which support supplementary carbon arms 17. These supplementary steps, indicated at 19, are shown in the form of detachable brackets. The base of each of the sides 12 and 13 is provided with an extension orlow step 20, above which each of the supplementary bracketsteps 19 is mounted. Each step includes a riser 21, which rests on the low step 20, and an overhang 22 which forms a supporting surface for one of the carbon arms 17. The overhang or flange 22 is located at such a level as to form a step extending in regular series with the rest of the steps on each of the sides 12 and 13. The flanges 22 are provided with perforations 23, similar to the openings 15, forming sockets for pins 16 provided on the detachable carbon arms 17. The carbon arms in all cases are provided with handles 24, so that they may be easily removed from the sides of the carbon carriage 10.

The'supplementary steps 19 are detachably secured to the sides 12 and 13 by means of set-screws 25, which extend through openings 26, provided in the riser 21, and engage in screw-threaded sockets 27 provided in the sides 12 and 13. For the purpose of further locating and accurately determining the position of the steps 19, there are provided centering pins 28 on the sides 12 and 18, which extend through properlylocated openings inthe riser 21.

The manner of operating the device is more particularly described in the patent to Smith, above mentioned. The carriage 10 travels forward and back, with and relative to the work-sheet web, so as to make the subject-matter printed on the top layer of the work-sheet web take on the under layers, and also so as to use the carbon sheets repeatedly with successive sections of the work-sheet web. The supplementary steps'19 may be used or not, as desired, according to the number of layers in the work-sheet web. \Vhen it is not desired to use them, they can be quickly detached from the sides 12 and 13. so as not to be in the way. In other words. the carbon carriageis made variable as to the number of carbon arms which it can support. Ordinarily, the number of carbon arms provided on the fixed steps 14 will be sufficient to take care of the of copies which would be made, but with the provision of the detachable steps, a greater number of copies can be made without putting an extra drag on the work-sheet as it is being drawn around the platen when the extra carbon arms and carbon sheets are not necessary.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, 1 claim:

1. The combination with a platen arranged to support and feed an assembled pack of work-sheet web and carbon sheets, of a carbon carriage for the carbon sheets, traveling to and fro to keep pace with the travel of the work-sheet web, and to space the carbon sheets relatively to the work sheet web, a plurality of series of fixed steps provided on said carbon carriage, a plurality of detachable steps, one extending in regular order with the steps of each of said series, and detachable carbon arms mounted on all of said steps. 2. The combination with a platen arranged to support and manipulate an assembled pack of work-sheet web and carbon sheets, of a carbon carriage for said carbon sheets, a plurality of fixed steps, ascending in regular order, provided on said carbon carriage, a detachable step, forming an extension in regular order of the ascending steps, and a detachable carbon arm secured to each of said steps, including the fixed and detachable steps.

3. The combination with a platen arranged to support and manipulate a worksheet web with intermingled carbon sheets, of a carbon carriage for said sheets, a pair of sides for said carbon carriage, each formed in a series of ascending, fixed steps, a low step extending in the rear of each of said sides, a bracket having a riser mounted on each of said low steps, and a flange overhanging each of said low steps, forming a detachable step, having a supporting surface at a higher level than the supporting surfaces of the fixed steps, and carbon arms detachably supported on said fixed and movable steps.

1. The combination with a platen arranged to support and manipulate an assembled pack of intermingled work-sheet web and carbon sheets, of a carbon carriage for said carbon sheets, a detachable step on said carriage, including a riser and an overhanging flange forming a supporting surface, a carbon arm detachably mounted on said flange, a set-screw for securing said detachable step to said carbon carriage, and a centering pin for locating said detachable step upon said carriage.

5. The combination with a platen. of a carbon carriage cooperating with'said platen to manipulate carbon sheets used in connecon said treads and extending toward each tion with a work-sheet Web on said platen. other, so as to overlap each other at difiera pair of detachable steps secured to oppoent levels. site sides of said carbon carriage, each ineluding a riser and an overhanging flange CHRISTIAN ALBERT MARSGHEL forming a tread or supporting surface, said Witnesses: treads or supporting surfaces being located M. E. Mnssme, at different levels, and carbon arms mounted J OHN F. BURKE.

flopies of this patent may be obtained for live cents each, by addressing the Commissioner of Watentn, Washington, D. G. 

